Clinching press



Sept. 16, 1930. KRUTT 1,776,124

' cmncnme PRESS Filed Oct. 4, 1929 a E INVENTOR ATTQRNEY Patented Sept. 16, 1930 ATENT ISRAEL KRUTT, or NEW YORK, n. Y., nssrenon or onE-HALFro rsrnonn sen-non- MAN, or teaooxnyn, NEW YORK omncnrne :ennss Application filed October 4, 1929. Serial No. 397,302.

This invention relates to devices for pressing, clamping and bending sheet metal parts during their formation and has special reference to devices used in assembling the 6 metal corner frames and re-enforced edges of pocket-books and like leather articles of the types in vogue by wo1nen.-

One of the objects of the invention is to provide a device, which may be firmly se- 10 cured to a work bench and actuated, so far as the pressing or gripping elements are concerned, by the foot of an operator, thus leaving the hands free to maneuver the parts operated upon.

A further feature is in the provision of compound levers directly operating the movable jaw of the device whereby a powerful effect is obtained with the expenditure of moderate energy.

Another purpose is to produce a device in V which the press members have combined with them, means to facilitate the assemblage of parts, and also an anvil for straightening such parts as may require such treatment, the anvil being provided with a removable cushion whereby the finished surfaces of the parts are protected from being marred.

These and other advantageous objects, as will hereafter appear, are accomplished by the novel design, construction and combination of parts hereinafter described and shown in the accompanying drawing, forming a material part of this disclosure, and in which:

Fig. 1 is a top plan view of an embodiment of the invention.

Fig. 2 is a side elevational view of the same.

The device is shown as consisting of an elongated, substantially triangular base 10 firmly secured on a bench or table by screws and having at the front an extension 11 in which is a horizontal recess 12 at its forward edge.

Raised from the base 10, rearward of the extension, is an upright 13 having at the front a down-reaching horn 14, extending in spaced relation above the extension, and carried by the end of the horn is a transverse jaw 15 reaching equally outward at both ends.

In the rear and lower portions of the up greater width and so arranged that the front edges of both jaws aline when the lower, movable jaw is moved upwardly against the upper aw.

The lower jaw is held normally depressed by reason of a coiled expansion spring 21 extending between the base 10 and lever 18, the spring being held in operative position by pins as shown.

A stop screw 22 isset adj ustably in the base and provided with a lock nut 23, the stop limiting the downward movement of the lever and hence the approach of the jaws 15+20.

A pair of links 24 are pivotally connected at their ends respectively to the lever 18 and the arm 25 of a bell-crank lever fulcrumed at 26 in the recess 16 of the upright, the other, longer arm 27 of the lever extending rearwardly and being pivotally connected to a clevis 28 on the end of a rod 29 reaching downward through the bench and being connected at its lower end to treadle or foot lever, not shown, but which will be readily understood.

The upper end of the upright 13 is formed to extend laterally outward at one side Con.- stituting in efiect' an anvil 30, in the side edge of which is an angular groove 31 used in adjusting the corners of the parts duringassemblage. f

The level horizontal surface of the anvil contains openings 32 receptive ofpins 33 fixed in a metal cover plate 34:, on whichis secured a cushion 35 such material as leather adapted to prevent abrasion or marring of the finely finished surfaces of the parts which may be hammered in straightening or bending on the anvil.

In operation, the parts of a frame which are usually channel shaped, and the leather or other fabric of the bag may be assembled by the aid of the extension recess 12, the base of the channel frame resting against the wall of the recess while the edge of the leather or other fabric of the bag is disposed between the legs of the channel, and then the frame parts are held against the fixed jaw 15, there being a considerable space therebeyond in the upright into which the work may enter. 7

When the parts are in position for clamping, the foot treadle will be depressed, which movement transmitted through the rod 29 to the lever arms 27-25, causes the upper ends of the links 24 to move in a similar path andpress therear end ofthe lever forcibly downward, overcoming the spring 21 until further movement is arrested by the adj ustable stop 23.

Obviously, the movablejaw 20 is raised to contact the channel frame held on the aw 15 and the channels are powerfully compressed therebetween, to firmly grip the leather or other fabric of the bag, being held until the pedal is released.

It is to be noticed that the lower, movable jaw extends inwardly to a greater distance than the upper fixed jaw, so that compression is secured adjacent the margin of the work parts, which after undergoing the press operation may be further treated on the cushioned anvil.

From the foregoing it will be seen that an effective but simple press device, actuated by an efficient compound lever system, has been disclosed in the preferred embodiment of its construction. It will be obvious however that changes in proportions and'minor details of construction may be made withoutdeparting from the claim as denoting the invention, without the exercise of invention.

Having thus described the inventionand set forth themanner of its construction and application, what is claimed as new and sought to secure by Letters Patent,is:

A press comprising a base, a recessed upright, compound levers pivoted'in the recess of said upright, operating means engaged with one of said levers, a jaw carried by another of the levers, ajaw on said upright, said jaws extending when in register towards the front and laterally outward at their ends, re-

silient means for normally retracting the lever carried jaw, and a stop limiting the closing of said jaws.

Signed at New York, in the county and State of New York, this 1929.

' ISRAEL KRUTT.

1 3th day of March, 

